Results 1 to 6 of 6

Thread: Airing down

  1. #1
    JTS Contributor 4.3LXJ's Avatar
    Join Date
    Sep 2016
    Posts
    219
    Post Thanks / Like

    Airing down

    Starting with Episode 300, a multipart series on airing down tires.

    Why air down?

    Greater traction
    Better ride
    Increased puncture resistance.

    How much should I air down?

    That depends on a number of factors such as vehicle weight, load range of the tires and tire size. Start with 15 psi as a target and adjust it from there. You should try to get a tire footprint that is about 10" long

  2. Thanks Tony thanked for this post
  3. #2
    JTS Host Tammy's Avatar
    Join Date
    Sep 2016
    Location
    Maryland
    Posts
    217
    Post Thanks / Like
    Great series!!! can't wait for the next one!
    Tammy


  4. #3
    JTS Contributor 4.3LXJ's Avatar
    Join Date
    Sep 2016
    Posts
    219
    Post Thanks / Like
    The next step in airing down is to have a good tire gauge. There are lots of gauges out there, the pencil type, digital and dial. The pencil ad digital can be handy, but don't give you real accurate readings. A pound of difference in pressure can make a big difference in tire diameter. It is important, especially if you have lockers to have the same tire diameter at all four wheels. The best type is the dial gauge in the 0 - 60# range. A 0 - 15# is also useful if you are running pressures in that range over very soft terrain. The best ones have a little push button relief valve on them that allows you to let air out slowly to get the pressure just right

  5. #4
    JTS Contributor 4.3LXJ's Avatar
    Join Date
    Sep 2016
    Posts
    219
    Post Thanks / Like
    Now that you can measure your tire pressure, you can let the air out. There are devices made for this that will depress your valve core for you. The first is the keychain type that you screw on and then monitor the pressure. They are the least expensive and can be used to achieve any tire pressure, including completely flattening the tire to make the Jeep easier to work on. The second type is the preset type that you dial in before hand. You can just screw them on to the valve stem and forget it and they will automatically deflate the tire down to the preset range. Quick and easy, but if you use more than one tire pressure you have to have a second set. The third type is used in the HVAC industry to remove the valve stem and allow a very rapid rate of deflation. Useful on very large tires. However make sure you watch them closely, it is real easy to let too much air out

  6. #5
    JTS Contributor 4.3LXJ's Avatar
    Join Date
    Sep 2016
    Posts
    219
    Post Thanks / Like
    The easiest and cheapest source of compressed air for a Jeep is the multitude of small electric compressors that are available. There are too many for me to rate, so here are some rules of thumb for choosing your compressor. If you can plug it into a cigarette lighter, don't bother. It is too small to pump up four off road tires. It will seem like an eternity passes before you are aired up to road pressure from 15 psi or below. The smaller ones are fine for one tire by itself, but don't have the capacity or duty cycle to handle four. So if it doesn't hook up to the battery directly for power, don't bother. Admittedly they start getting a little expensive toward the high end, but you won't be sorry if you go this route

  7. #6
    JTS Contributor 4.3LXJ's Avatar
    Join Date
    Sep 2016
    Posts
    219
    Post Thanks / Like
    The next step up for some big air is to get away from the electric compressor, with one exception. The Warn Power plant is capable of producing 5 cfm at 90 psi. This is as good as a shop compressor and is a complete unit. Plug and play. The price tag might scare you a little, but think about a little. A good Warn winch runs about $1300 give or take. That leaves $600 for a complete compressor system. A 20 amp system which delivers 20% of the air or less runs about $450. So for the price of that winch you want plus $150 you can get a really good trail/work system and have a 1200# to go with it.

    The next step up is the converted Air Conditioning compressor. We will spend a little time on this one. To get a good idea what we are dealing with I suggest watching the Youtube video "On Board Air The Right Way" https://www.youtube.com/watch?v=q39yoOjlU4c&t=32s

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •